SU97775A1 - Method for separating fatty acids with chains containing carbon numbers from 5 to 9 from an aqueous solution of a mixture of fatty acids - Google Patents

Description

The invention relates to methods for separating fatty acids with the number of carbon-a atoms from 5 to 9 from an aqueous solution of a mixture of fatty acids with the number of carbon atoms from 1 to 9, for example. fatty acids Cr, Hj ,, O- - CuHjgO ;, from water condensate in the production of synthetic fatty acids containing acids of the series CH., O., - ССН ,, О ,.

In comparison with the known method of selective extraction, the proposed method greatly simplifies the separation of these acids from an aqueous solution.

The peculiarity of the proposed method is that the aqueous solution heated to 50-bO is treated with electrolyte, the treated solution is settled and the floating layer of fatty acids is separated.

The method is carried out as follows. Heated to a temperature of 50-60 an aqueous solution of fatty acids with an acid number of about 300 with stirring, is treated with an electrolyte, for example, dry Glauber's salt, taken in an amount

15-20% of an aqueous solution, or calcium chloride.

After treatment with these salts on the surface of the aqueous solution, a portion of the fatty acids, which are easily separated from the lower aqueous solution, is obtained with a simple decanting after a short sludge or separation.

The selected layer has an acid number of about 370, i.e. is a mixture of acids containing carbon atoms within the numbers 5-9,

The proposed method is carried out in conventional standard type apparatus made of acid-resistant materials.

Subject invention

A method for separating fatty acids with chains containing from 5 to 9 carbon atoms from an aqueous solution of a mixture of fatty acids with 1 to 9 carbon atoms, for example, Cj.HjoOo-Cc.iHigO fatty acids from aqueous condensate in the production of synthetic fatty acids containing a mixture of fatty acids СЬО. - SzN18O2, characterized in that, in order to accelerate the process and eliminate the operation of selective extraction, an aqueous solution of the mixture heated to 50--60 is affected by an electrolyte, for example, Glauber's salt or calcium chloride, and the emerging layer of acids with carbon atom 5 to 9 are separated after settling.